[An outline of pulmonary hemorrhage - A pulmonologists perspective]

Hemoptysis resembles a clinical emergency and necessitates a fast and well-coordinated diagnostic and therapeutic approach. While up to 50% of the underlying causes remain unidentified, the majority of cases in the western world can be attributed to respiratory infections and pulmonary neoplasm. While 10% of the patients present with massive, life-threatening hemoptysis, which require a timely airway protection in order to secure a sustained pulmonary gas-exchange, the vast majority presents with non-critical pulmonary bleeding events. Most critical pulmonary bleeding events arise from the bronchial circulation. An early chest imaging is key for identifying the bleeding cause and localization. While chest x-rays are widely implemented in the clinical work-flow and rapidly applicable, computed tomography and computed tomography angiography exhibit the highest diagnostic yield. Bronchoscopy can add diagnostic information especially in pathologies of the central airways, while offering multiple therapeutic options to maintain pulmonary gas exchange. The initial therapeutic regimen comprises early supportive care, but treatment of the underlying etiology is of prognostic relevance and avoids recurrent bleeding events. Bronchial arterial embolization usually is the therapy of choice in patients with massive hemoptysis, while definitive surgery is reserved for patients with refractory bleeding and complex pathologies.